package com.jemaa.news.app;

import java.io.File;

public class Utils {

	public final static String jpeg = "jpeg";
	public final static String jpg = "jpg";
	public final static String gif = "gif";
	public final static String png = "png";

	/*
	 * Get the extension of a file.
	 */  
	public static String getExtension(File f) {
		String ext = null;
		String s = f.getName();
		int i = s.lastIndexOf('.');

		if (i > 0 &&  i < s.length() - 1) {
			ext = s.substring(i+1).toLowerCase();
		}
		return ext;
	}
	
	public static boolean isValidExtension(String fileName) {
		String ext = null;
		int i = fileName.lastIndexOf('.');

		if (i > 0 &&  i < fileName.length() - 1) {
			ext = fileName.substring(i+1).toLowerCase();
		}
		
		if(ext != null) {
			if (ext.equals(gif) ||
				ext.equals(jpeg) ||
				ext.equals(jpg) ||
				ext.equals(png)) {
				return true;
			} 
		}
			return false;
	}

}